The outter staircase (on way to your bed) turns into a do not enter area at night.
Just the outter staircase, if you enter the room at the top you are out of trouble,
if you reach the bottom you are also out of trouble (night only).

Suchdol tavern, NPC don't like it when you try to reach your room at night (kickout rabbit),
also the door to your room at the tavern can't be opened (day or night).